Testing arrangement.



H. P; CLAUSEN.

TESTING ARRANGEMENT.

APPUCATION FILED SULY 24 i916 1,220,607. Patented Max-27,1917;

. by A i wry paratus under test. Such term is commonly UNITED STATES PATENT OFFICE.

HENRY P. CLAUSEN, 0F MOUNT VERNON, NEW YORK, ASSIGNOI T0 WESTERN EI-EG G COMPANY, INCORPORATED, OF NEW YORK, N. Y., A GORPOR. L'I'ION OI HEW YORK.

'rnsrme ARRANGEMENT.

ment for performing routine tests in tele-- phone exchange systems. More specifically the invention-relates to a testing arrangement for locating open circuits in multiple connections between telephone apparatus, such open circuits constituting an unstandard condition.

By the term unstandard condition 15 meant a condition which does not exist in the standard operation of the system or apused by workersin the art, including conditions yariously referred to as cases of trouble, abnormal conditions or faults.

It has previously been the practice in telephone exchange systemaior an attendant to periodically test the multiple connections either between jacks in an ordinary manual switchboard, or-between. switch banks in automatic exchange systems, in order to ascertain if such multi le eonnections are intact. It has been the piigtice of such attendant to connect testing in ruments to various parts of the multiple connections and to deduce from the operation of such testing instruments whether or not such multiple connece nections were intact. In accordance with the present invention, however, an arrangethe multiple connections are usually, ar:

ranged 1n groups or sets in accordance with" the present. invention, A vines are provided as there are multiple con- Specification of Letters Patent.

Application filed. July 24,

Pa tented Mar. 2'7, 1917.

1916. Serial No. 110,961.

are adapted to be simultaneously associated with a set of multiple connections wherebyit is possible to t( st such multiple connectlons 111 sets.

The invention will best be understood by reference'to the accompanying drawing, in which the figure s 10WS diagrammatically a plurality of switdi contact hanks having multiple connecti )ns extending therebetween and a testing; arrangement for testing for unstandard conditions in such multiple connections. I

Two automatic s witches are indicated at 1 and 2, the stationary contacts of which are connected together in multiple by means of multiple connections indicated at 3, 4, 5, 6, 7 and 8. Although (nly two such switches are shown, it will be understood that a large number of such sw ,tches may have their contacts connected tofg ether by multiple connections as shown; or example, loops for the multiple connectio:1s 3, 4, 5 are indicated at 9 and loops for the multiple connections 6, 7, 8 are indicated at 10, which loops may be connected to OOHtEU :ts of an additional switch in the same manner as the contacts of the switches 1 and 2 a re connected to such multiple connections. 1L1} one end of the multiple connections 5 l, 5 we connected the contacts 11, 12 and 13, and at the ,other end are connected the contacts 14:, 15 and 16, which contacts form a part if the contact bank of an automatic switch of known construction, in which movable brishesjndicated at 17, 18, 19, 20, 21 and 22 are adapted to be moved over the contacts 1.. to 16 inclusive, and simiare mounted vupor a single brush carriage which may be stepped from one row of contacts to the next in response to the inter inittent energizath n' of t estepping magnet indicated at 29. Switches of this character arewell known anl the brushes thereoi may either be moved longitudinally along a'flat bank or panel of contacts, or may be moved in a circular direction over a cylindricalbank of contacts, both constructions being well known. The ")rushes 17 and 20 are connected at either eni of thecirc'uit, including if? ,as many testing de-w a battery30, a test relay Ill-"which test relay as shown is of-tho slow re ease type; sinu It motions in" a set, all of which testing devices larly, thebm h M1 2 areeqnnectedet .1

tirely automatically.

either end of a circuit including a source of potential 32; also the brushes 17 to 22 are connected at either end of a circuit including a source of potential 34 and a test relay The test relays 33 and 35 are also of the slow release type. A recording .rnagnet controlled by such test relays is indicated at 36.

The operation of the arrangement will now be described, it being assumed that the contact brushes 17 to 22 of the testing switch are resting upon the contacts associated. with the multiple connections indicated at 37 to 39, having completed. the test thereof. It will also be assumed that no open circuit ex ists in the set of multiple connections indiouted at 6, 7 8 and that an open circuit. and hence on nnstandard condition exists in the connection 4 of the of multiple conncotions indicated at 5. il, The arrangement is started in operation by the throwing of the manual. switch 40. After such switch is once thrown, the testing and recording operation of the arrangement takes place on- As soon as the switch 40 is thrown and the conducting segments of the interrupter 41 make contact with the interrupter brushes,-

a circuit is closed from battery through the stepping magnet 29, interrupter 41, lefthand arm of the manual switch all) to ground. Stepping magnet 29 is energized in this circuit, and steps the brushes 1.? to 22 into contact with the row of contacts 23 to 28. As soon as the brushes 1'? to 22 make contact with the row of contacts 23 to 28, there being no open circuits in the case assumed. in the set of connections (3, 7 and 8 a circuit will be closed for the test relay 31 from but tery to therelay 31, brush 17, contact 23,

connection 8, contact 26, brush 20, back to the other side of the battery. A similar circuit will he closed for the test relay 33 from battery 32, test relay 33, brush 18, contact 24, connector 7, contact 2?, brush 21 to the other side of battery 32. A circuit will also be closed for the relay 35 from battery,

through the relay 35, brush 19, contact 25,

per,

connector 6, contact 28, brush 22, to the other side of the battery. All three of the test rclays will be energized under these conditions, as no unstandard condition exists, hence there will be no energizing circuit for the recorder magnet 36, as the energizing circuit for such magnet is open at the back contact of the test relays. ducting segments of the interru iter again bridge the interrupter brushes, a circuit will be established for the stepping magnet 29, and the brushes 17 to 22 will be advanced into contact with the row of contacts 11 to As the relays 31 to 33 and 35 are slow release relays, the armatures thereof will not he released while brushes 17 to 22 are passing between the rows of contacts. It being assumed that there is an unstandard When the con? condition in connector 4-, as soon as the brushes 17 to reach contact with the contacts ll to 16 there will be no circuit for maintaining the test relay 33 energized. The relays 31 and however, will hold up, as their circuits will be completed over the conductors 3 and. which are in-the standard. condition. Whcn the relay 33 releases its armatin'e, indicating an unstandardcondition, a circuit is closed for the recorder magnet from battery, through such recorder magnet, conductor 13, back contact and armature oi? relay 33, conductor 42, right arm of switch 40 to ground.

The recorder magnet 36 will operate and will. cause suitable recording mechanism to make a record of the existence of an unstandard condition. From a subsequent inspcction of the record thus made, an attendant can determine in. which of the nniltiple ozn'inections the unstamlard condition exists and can thereupon remedy such unstandard condition. As soon as the conducting segments of the interrupter again bridge the brushes thereof, an energizing circuit is closed for the stepping magnet 29 and the brushes 1.7,to 22 are advanced to the next set of contacts and the testing opera tion as alDOVQ described is repeated. It will heobserved that in. the arrangement described, if only standard conditions in the multiple connections, the test relays 31 to 35 will remain energized as the switch brushes are moved from one set of the contacts to the other and the recorder magnet therefore will only be energized to record an unstanda-rd condition when one or more of such relays releases its armature.

lVh-at is claimed is:

1. .An arrangement for testing for unstandard 'onditions in the multiple of a telepho :lmngc system, comprising a testing device Kl-#PllQ-Ql to operate differently in rcspu-mso to electrical. conditions indicating .5 andard and uns...nnlard conditions, ultiple connections, contacts associated with each end of such multiple connections, and automatic means for connecting such testing device withsuch contacts.

2. An. arrangmient for testing for unstzunlard condition in the multiple of a telephone .l'ninge cm; comprising a. testmg dc adapted to (met-ate differently in rcspon 1 elc. npal conditions Indicating connected to each end of such multiple connections, a pair of brushes adapted to make contact with such mutants, a testing devirec assuuiutwl with suvh hrushos, and menus for uuitumutil-ullywringing |u:l1 brushes into operative gvlutiuu with such contacts.

:\u :u'l'nugvmvnt for testing for unstmuhml (-mulit-ions in thlyulultiple of u tulephuuv exchange system, coniprisil'ig a test relay and x circuit; for such test relay, including :1 multiple connection, and means (fUIltIUllGtl by thev lefi11u-giza1;i0n of such test relay for 1- 2('Ol'lllll] an unstandaufl 00n- .liti0n.

In witness u' loreof, I hereunto subscribe my mum: this 2)th (lay of.

l-IIGNR Y P. CLAUSEN.

July A. D. 1916. 15 

